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Need a hot wire from ac compressor

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  #1  
Old 07-12-2016, 05:51 PM
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Need a hot wire from ac compressor

I'm wiring up electric cooling fans on a 1995 f150 4x4 4.9l and I need a hot wire from the ac. Can someone please let me know which one wire it is?
 
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Old 07-13-2016, 04:41 AM
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Should be able to look at the wire colors on the plug for the AC compressor.
I'm thinking black/yellow stripe.
 
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Old 07-13-2016, 07:47 AM
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Disconnect wiring harness at AC compressor. Turn truck on and turn AC on. Use a multimeter or test light and connect one lead to ground. Probe both pins of the wiring harness. One of them should indicate 12V on the multimeter, or make the test light light up. That's the wire you want.
 
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Old 07-13-2016, 08:01 AM
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The Dark Green/Orange wire is hot whenever the A/C is selected and the compressor is engaged. If you want the fan(s) to run continuously when A/C is selected use the Pink wire on the input side of the low pressure/clutch cycling switch.
 
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Old 07-13-2016, 08:03 AM
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Thank yall. I checked both wires and neither showed hot. Does the ignition need to be only on or truck running?
 
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Old 07-13-2016, 08:32 AM
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RLA2005, thank you for the information and schematic!
 
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Old 07-13-2016, 08:43 AM
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Originally Posted by jason gressley
Thank yall. I checked both wires and neither showed hot. Does the ignition need to be only on or truck running?
Note the diagram above....Fuse 6 is Hot with the key in Acc or Run position.
 
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